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~:~ LANDMARK RECLAMATION, INC. MR. Joseph J. Dudash Colorado Mined Land Reclamation 1313 Sherman Street - Room 215 Denver, Co 80203 Re: Rimrock Coal Mine Dear Mr. Dudash, III IIIIIIIIIIIIIIII 999 SAN 1 41993 JANUARY 12 , 1 ~~ DI y;S.t ,; , WS are evaluating the economics of punch mining the coal at the highwall face at the Rimrock mine with a remote controlled continuous miner. The miner would mine 50 ft. to 100 ft. into the vein, leave a 5 ft. pillar for support, and mine another drift parallel to the original drift, leave another 5 ft. pillar, and so forth. Most of the present e ft. to 900 ft. of the Pha excavated only to the ext. allow access by the contir disturbance would be on tY disturbance will be mur Subsidence on the Phase I have already mined to the subsidence has occurred. where no old underground expected. xposed face would be mined as well ae 700 se II area. The Phase II area would be ant necessary to expose the coal vein to iuous mining machine. All of the surface e present permit area and actual surface :h less than strip mining the area. area is not expected to be a problem. We edge of old underground workings and no The punch mine activity will take place mining is shown and no subsidence is Any subsidence that may occur at the punch entry areas on Phase II will be repaired as specified in the permit, although no subsidence is expected as it appears the coal lies directly below a solid consolidated sandstone. All punch mine entries will be backfilled as specified in the permit as near as possible behind the punch mine operation. Topsoil removal and replacement, overburden removal and replacement (for punch mine), and reclamation will remain as permitted. Please call me if you have any questions. /~erely~ Mark Kerr Operations Manager 4901 South Windermere Street, Littleton, Colorado 80120 Telephone: (303) 795-5130 Fax: (303)795-3249